Respect the disabled extension list during binding initialization.

ui/gl/gl_osmesa_api_implementation.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <vector>
+
+#include "base/strings/string_split.h"
 #include "ui/gl/gl_osmesa_api_implementation.h"
 
 namespace gfx {
 
 RealOSMESAApi* g_real_osmesa;
 
 void InitializeStaticGLBindingsOSMESA() {
   g_driver_osmesa.InitializeStaticBindings();
   if (!g_real_osmesa) {
     g_real_osmesa = new RealOSMESAApi();
   }
   g_real_osmesa->Initialize(&g_driver_osmesa);
+  g_driver_osmesa.InitializeExtensionBindings(
+      g_real_osmesa->GetEnabledExtensions());
   g_current_osmesa_context = g_real_osmesa;
 }
 
 void InitializeDebugGLBindingsOSMESA() {
   g_driver_osmesa.InitializeDebugBindings();
 }
 
 void ClearGLBindingsOSMESA() {
   if (g_real_osmesa) {
     delete g_real_osmesa;
@@ skipping 23 matching lines @@
 RealOSMESAApi::RealOSMESAApi() {
 }
 
 RealOSMESAApi::~RealOSMESAApi() {
 }
 
 void RealOSMESAApi::Initialize(DriverOSMESA* driver) {
   InitializeBase(driver);
 }
 
+std::set<std::string> RealOSMESAApi::GetEnabledExtensions() const {
+  std::set<std::string> enabled_extensions;
+
+  std::vector<std::string> platform_extensions_vec;
+  std::string platform_ext = DriverOSMESA::GetPlatformExtensions();
+  base::SplitString(platform_ext, ' ', &platform_extensions_vec);
+
+  enabled_extensions.insert(platform_extensions_vec.begin(),
+                            platform_extensions_vec.end());
+
+  return enabled_extensions;
+}
+
 TraceOSMESAApi::~TraceOSMESAApi() {
 }
 
 }  // namespace gfx